Internet Explorer popups but i dont use it

I have just updated to Mozilla Firefox 1.5rc1. ( I dont belive that this is the cause just giving backround information). I have a router that I have not had a chance to port forward so it is set to DMZ. I run SpywareGuard, Sygate Personal Firewall Pro, Norton Internet Security 2005, and i am innoculated with SpywareBlaster.

I have never really had a problem with adware/malware/virus because i tend to keep up on it and check it regulary. But now I am getting different IE popups even though i am using firefox

I would really appreciate any help in this matter..
Also im new so if i have not followed any preliminary steps i do appologies.

I guess just didnt do enough scans...Norton found all kinds of stuff this time for some reason...Well i deleted all that i could. . Then manually deleted a few...The two that were left i use "moveonboot" to delete at the next system startup. Im rerunning norton as we speak to see if it finds anything new. I will post my results.